#nixos-aarch64 on 2019-02-05

2018-09-23 16:56 gchristensen changed the topic of #nixos-aarch64 to: Get access to the NixOS Community aarch64 build box: https://github.com/nix-community/aarch64-build-box ... todo: https://hydra.nixos.org/jobset/nixpkgs/trunk#tabs-jobs build box status: https://monitoring.nix.ci/d/hkRCcV0mk/instance-metrics?var-instance=aarch64.nixos.community&orgId=1

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17:15 <samrose> samueldr: had you dug into working with GPIO uart etc in your PINE 64 work at all?

17:15 <samueldr> no

17:16 <samrose> ok, was worth a shot :-D

17:16 <samrose> I think I may need to enable in my dtsi or similar

17:17 <samrose> or dts rather

17:18 <samueldr> please take notes :)

17:20 <samrose> samueldr: of course. I will have to build it into the OS, and so will have it documented that way too

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17:26 <samrose> samueldr: wait, maybe I just need to specify it here? https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix#L27 I guess there is an alias in the dts like https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts#L55

17:27 * samueldr has no idea about that

17:27 <samueldr> only thing I know is that it could be annoying to do right now hardcoded https://github.com/NixOS/nixpkgs/blob/a26117593dfa034ea444ba9ac7ce38bb1ace4b97/nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh#L78-L82

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17:29 <samrose> samueldr: so right now, if I am building https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/cd-dvd/sd-image-aarch64.nix it doesn't actually know anything about my specific board, is that right?

17:30 <samueldr> knows nothing more than the dtb in u-boot or the one from the kernel tree

17:30 <samrose> (other than what is in u-boot or kernel got it)

17:30 <samueldr> u-boot will hardcode a name in the u-boot build, which will be used to find the right one from the kernel

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17:33 <samueldr> [citation] http://git.denx.de/?p=u-boot.git;a=blob;f=include/configs/sunxi-common.h;h=b01d1c3c843516733a9895866032d1e3958cd14b;hb=HEAD#l495

17:33 <samrose> samueldr: u-boot hardcoding an a name in u-boot build is coming from where we are specifying 'bananapi_m64_defconfig' or our given board

17:34 <samueldr> yeah, the line I linked uses CONFIG_DEFAULT_DEVICE_TREE

17:34 <samueldr> http://git.denx.de/?p=u-boot.git;a=blob;f=configs/bananapi_m64_defconfig;h=7dc768ff9fa2652ed84c050254d7ea78dfd59cce;hb=HEAD#l13

17:37 <samrose> samueldr: thanks it seems my build is already using it

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